THEORETICAL ANALYSIS OF TUNNEL LINING SUBJECTED TO FIRE

The present paper aims to investigate the impact of fire on the behavior of concrete structures such as tunnels. In this paper, the non-uniform work hardening plasticity model (Willam-Warnke five-parameter model) was adopted as yield and failure criteria for concrete. The tunnel was investigated after being exposed to a fire, by means of a FE 3-D model. Moreover, the behavior of the tunnel during heating and cooling processes was studied. Furthermore, the tunnel was also analyzed by a FE 2-D model, in order to make comparisons between the two models.